Windows 7 acting weird and very slow

Hello everyone.

I just did a format C and installed Windows 7 x64 again due to new hardware. I never had any problems with it before.

I managed to capture what I mean:

Can anyone tell me why my Windows is running really slow and almost like in "safe mode"? Everything else seems fine.

I have installed the latest driver for AMD Radeon Crimson and did a Windows Update (manual, because it was stuck at search..) and I don't have any extreme programs or games running in the background.
As told the windows is clean.

Info:
- Windows 7 x64
- 120GB SSD for C
- AMD FX 8320 Eight-Core Processor 3.50GHz (1 month old)
- 16 GB Memory (1 month old)
- AMD Radeon R9 380 4GB (2 weeks old)
- MSI 990FXA GAMING AM3+ (1 month old)

What is causing this problem? I can't break the code. Please let me know if I can provide more information or let me know how to.

Thank you for the help!
Best regards!